EL PASO (AP) - A Mexican woman who confessed six times to a shooting has pushed her murder case into murky legal territory as she argues police violated her rights by not telling her she could call her consulate.

Evidence gathered against Isabel Portillo should be tossed out because the police's lapse is tantamount to not telling someone of her right to remain silent, said her attorney, Margarito Rodriguez.

The detective who interviewed Ms. Portillo "was going to get a statement from her in any way, shape or form he had, and he was willing to play fast and loose with the rules," Rodriguez wrote.

The trial is set for September.

District Attorney Jaime Esparza said his office has determined that El Paso authorities are complying with the law.

Ms. Portillo's arguments may shape her case into a test of consular rights, an area of law being debated in the highest courts in the world.

At issue is whether foreign nationals charged with a crime in the U.S. must be informed of their right to contact a consular official from their nation.